Response of maize in rotation with soybean and forage crops to nitrogen and its consequence on the quality of organic matter

• Grant number: 19/15563-7
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2020
• End date: June 30, 2022
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Ciro Antonio Rosolem
• Grantee: Ciro Antonio Rosolem
• Host Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

The present proposal addresses the continuation of two long-term experiments initiated and conducted to date within the project NUCLEUS: An associated virtual center to promote improvements in the efficiency of nitrogen use in the UK and Brazil through soil- integrated plant. The subproject 1 - Nitrogen fertilization for maize/forage in rotation with soybean and its effects on in soybean was started in 2018, and sub-project 2 - Quality of soil organic matter and carbon under maize/forage crops as affected by N fertilization was started in 2014. The present proposal aims to consolidate previous results and to complement other aspects not yet explored. Thus, the objectives are: (i) to determine if growing tropical grass species inhibits soil nitrification, affecting maize yield and its response to N, reducing N losses; (ii) to study the response of maize as second crop and the efficiency of N use after soybean, and the effect of the fertilizer applied to maize in subsequent soybeans; (iii) to evaluate the effect of N on forage composition and its relationship with soil carbon stock and MOS quality; and (vi) verify the effect of N fertilization on carbon input and soil organic matter quality as affected by the grass species. The proposal is intended to reach results that allow for a better understanding of N and carbon dynamics in intercropping systems, and in the end, give subsidies for better N fertilization recommendations, improving the fertilizer use efficiency, at the same time, favoring carbon sequestration. The results will be disseminated through publication in high-impact journals, technical journals, presentation of papers in congresses, field days, lectures and, of course, Undergraduate and Graduate courses. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GAZOLA, BRUNO; MARIANO, EDUARDO; ANDRADE, MARIA G. O.; COSTA, VLADIMIR E.; ROSOLEM, CIRO A.. Fate of fertilizer N applied to maize intercropped with forage grass and recovery of residual N by soybean in a double cropping system. PLANT AND SOIL, v. N/A, p. 15-pg., 2023-06-27. (18/15867-3, 19/15563-7)